Grandpa's Pen - Artifact

My grandfather, Jim Jaynes, was a self-employed plumber.  As a child I would watch him work at his desk with the most wonderful pen.  It is a fountain pen.  I kept it because I was so curious about it as a child.  Now, the bladder inside has turned to dust.  It certainly needs some help to make it work again.  I'm not even sure that can be done.  But it rests on my desk as it did on his for so long.